I’ve enabled Lazy loading for elements on the Home page, and set limit in Products element settings – https://tools.pingdom.com/#5eed2f1314400000
About next – https://prnt.sc/1ra1apt – they are not theme settings, contact your hosting provider to get help https://wpastra.com/add-expires-headers/
GTMetrix changed its testing system, and all the sites that had A, B scores get C, E or F, here is current result of your site https://prnt.sc/1ra1i0r Also, you may try to reduce the DOM results on the page by reducing the number of sections of the page/elements in the footer or header.
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